mlxsw: core_thermal: Remove unnecessary assignments

Setting both pointers to NULL is unnecessary since the code never checks
whether these pointers are NULL or not. Remove the assignments.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/ea646f5d7642fffd5393fa23650660ab8f77a511.1722345311.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlxsw/core_thermal.c

@@ -468,8 +468,6 @@ mlxsw_thermal_module_init(struct mlxsw_thermal *thermal,
 static void mlxsw_thermal_module_fini(struct mlxsw_thermal_module *module_tz)
 {
 	mlxsw_thermal_module_tz_fini(module_tz->tzdev);
-	module_tz->tzdev = NULL;
-	module_tz->parent = NULL;
 }
 
 static int